Can't Install Plugins (1 post)

All of my installed plug-ins simultaneously deactivated after uploading a gif file (overwriting another one) to my active theme folder. Of course, I realize, in hindsight, that's exactly what caused the problem. The strange thing is that, last I checked, all of the plug-ins are still in the active plug-in folder, but none of them show up in admin and any attempts to install new plug-ins has failed.